Road working broom



March 15, 1932. s OWEN ROAD WORKING BROOM Original Filed Dec. 4, 1929 2 Sheets-Sheet S. OWEN March '15, 1932.

Original Filed Dec. 4, 1929 2 Sheets-Sheet nmmnmmm mnunuvunWWWWW TM I Patented Mar. 15, 1932 ROAD WORKING BROOM Application filed December 4, 1929, SerialNo. 411,558.

It is the purpose of my invention to provide a road working broom which is simple and sturdy in construction, efficient in use and which will be relatively inexpensive to manufacture.

I will describe my invention in the best form known to me at present, but it will be apparent that the same is susceptible to changes in forms and proportions and to desirable additions by the exercise of only ordinary mechanical skill.

In the drawings chosen to illustrate my invention, the scope whereof is set forth in the appended claim.

Fig. 1 is a plan view of a road working apparatus having my invention incorporated therein;

Fig. 2, a side view of Figure 1;

Fig. 3, an end view;

Fig. 4, a vertical section of the broom or scarifier;

Fig. 5, a section on the line 55 of Figure 1;

Fig. 6, a vertical section through the mechanism for adjusting the broom carrying frame; and

Fig. 7, a vertical section through the pivotal connection between the main frame and the broom carrying frame.

Referring to the drawings, A indicates generally a main or supporting frame, which is fixed upon a wheeled axle 10 and includes a forwardly extending tongue 11 whereby the frame may be attached to a self propelled vehicle to be drawn by the latter. The frame A includes a cross bearing plate 12 carrying on one edge a bearing 13 for a purpose that will presently appear. Also mounted on the frame A is a cross member 14 having an ele vated central portion disposed over the bearing 13 and having an opening therein which registers with the opening of said bearing. Rotatably mounted in the bearing 13 and member 1 1- is a vertical shaft 15. Fixed on this shaft between the bearing plate 12 and cross member 14 is a pinion gear 16 and also fixed on said shaft above the cross member 14 is a ratchet wheel 17. A lever 18 has one end loosely mounted on the shaft 15 immediately above the ratchet wheel 17 and Renewed September 14, 1931. pivoted on said lever is a double pawl 19 for cooperation with the ratchet Wheel 17. From the construction just described it will be apparent that when one end of the pawl 19 is in engagement with the ratchet wheel 17 oscillation of the lever 18 will rotate the pinion 16 in one direction and that when the other end of the pawl 19 is in engagement with the ratchet wheel 1'? oscillation of the lever 18 will rotate the pinion 16 in the opposite direction.

Mounted centrally on the rear end of the frame A is a vertical pivot pin 20 which extends through an opening in a cross member 21 of a U-shaped frame B. The curved arm connecting portion of the frame B has fixed thereon a curved rack 22 with which the pinion 16 meshes whereby rotation of the pinion will effect angular adjustment of the frame B on the pin 20. To secure the frame B in a desired angular adjustment I mount on the cross member 14 looking pawls 23 and 24 which are adapted to be detachably engaged with the ratchet wheel 17 as will bev obvious.

This apparatus is designed to embody a road working implement in the form of my improved metallic broom or scarifier indicated generally at C, said implement being adjustable with the frame B and both angularly adjustable on a horizontal axis and vertically adjustable bodily with respect to the frame. I will now describe the mechanism for effecting said angular and vertical adj ustments of the element C. Mounted on the outer ends of the arms of the frame B are bearings 25 and 26 in which are vertically slidable respectively rods 27 and 28. The lower ends of these rods are pivotally connected respectively to brackets 29 and 30 fixed on the head of the element C. Fixed on one arm of the frame B is a bracket 31 on which a lever 32 is pivotally mounted, said lever having pivotal connection with the rod 27. Likewise a corresponding bracket 33 is fixed on the other arm of the frame 13 and on this bracket another lever 3 is pivoted with one end thereof having pivotal connection with the rod 28. By imparting simultaneous and corresponding oscillation to the levers 32 and 34 it will be apparent that vertical bodily adjustmcnt will be imparted to the element C. To secure the element C in a desired vertical. adjustment 1 mount on the frame B in association with each lever 82 and 34 a vertically disposed notched bar 35, the notches of which are adapted to selectively receive a suitable projection 36 on the related lever to thereby secure said lever against pivotal increment. Pivotally mounted on the cross member 21 at the center of the latter is a lever 3'? which. includes a lateral arm 38. Mounted cent on the head of the element C a braclretili) to which is detachably secured an arm 40 and said arm 40 is conne t free end of the arm 38 by a link 41 "hereby the oscillation of the lever 37 will angularly adjust the element G about the pivotal connections between the brackets 29 and 30 and the rods 27 and 28, respectively. To the element C in a desired angular adj us; I mount on the frame B adjacent the plane of movement of the lever 37an arcuat at 42 concentric with the pivotal axis or said lever. In this plate I pi'o-:ide notches 43 adapted to selectively receive a projection 4 on the lever 37 thereby to lock said lever against pivotal movement and in turn se-- cure the element C in a desired angular adjustment. It will be noted that the shape of the arm 41 and the manner in which it is connected to the bracket 39 permits it to be readily attached to the bracket in a position reverse to that shown thereby to permit the reversal of the element C when desired.

Referring now to the specific construction of my improved broom or scariiier C it will be noted that the same embodies U-shapcd metallic bristles 45 which embrace a head bar 46 of wood or other material of softer texture than the metal bristles. These bristles and head bar 46 are in turn embraced by a metallic head plate 47 of L-shaped cross section and a clamping bar 48 of wood or other material of softer texture than the bristles. Clamping bolts 49 extend through one arm of the plate 47, between the bristles 45, through the bar 46, and through the clamping bar 48. The bolts are operated in an obvious manner to clamp the parts together and complete the formation of the head of the broom or scarifier. To add further stability and ruggedness to the broom I provide a reinforcing bar 50, said bar being embr ced by the bristles 45 and spaced parallel to the bar 46. Overlying the respective outer faces of the broom in registry with the bar 50 are clamping strips 51 and 52, said strips and bar 50 being of wood or other material having a softer texture than the bristles. Protecting strips of metal 53 and 54 overlie the strips 51 and 52, respectively, and clamping bolts 55 extend through all of said strips, the bar 50 and between the bristles. I further strengthen the broom structure heretofore described by connecting certain the free end of of the clamping bolts 49 with certain of the clamping bolts 55 with braces 56 as shown. By forming the bars 46, 48, 50 and strips 53 and 54 of wood or material of softer texture than the bristles 45 I am enabled to more securely clamp said bristles against displacement under severe usage owing to the fact that the bristles will sink or imbed themselves in said bars and strips under the clamping action of the bolts 49 and 55.

I claim:

A road working broom comprising U- shaped metallic bristles, a head bar embraced by thebristles, clamping bars confining the bristles and head bar therebetween, clamping bolts extending through said clamping bars, head bar and between the bristles, a reinforcing bar embraced by the bristles and disposed in parallel spacement to the head bar, said reinforcing bar being of softer texture than the bristles, clamping bars overlying the outer faces of the bristles respectively, metallic facing bars overlying said clamping bars respectively, and clamping bolts extend iug through the facing, clamping and reinforcing bars and between the bristles.

In testimony whereof I hereunto aflix my signature.

SETH OWEN. 

